Guys chill a bit, it is his first spell, show some constructive criticizm please...
Now let me point something out:
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Set removeloc = ((Position of (Casting unit)) offset by 50.00 towards (Facing of (Casting unit)) degrees)
This leaks 1 location. The Position of Casting Unit leaks, therefore you should make it like this:
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Set removeloc = *some loc* offset by x towards y degrees
Also you should learn to use hashtables/indexing in order to make it MUI.
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Set waitcount = (waitcount + 1)
This will crash the WC once the waitcount becomes larger than 8191.
As i said refer to some tutorials about indexing/hashtables.
Also the idea is pretty generic, i would suggest adding some more stuff to the base idea, though i liked the eyecandy of the crows. Also you should never have an ability that creates another hero(there are reasons why).
Furthermore i would advise you to look the leak tutorial again if you already have to understand why Polar Projection and Point with offset leaks.
Hope this helps you and i hope you improve the spell to the point of the spell being acceptable.
EDIT:
I suggest you to improve the test map as it also influences the feel when you cast a spell, some trees and some terrain variation couldn't hurt.
Also rename the map name to something other than naruto(genjutsu.w3x for example)